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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '455b317978267588b35907264d40d9be9e46305bce1b9f7a472ed2aaf723858b' 
  AND token = 'aaWfZLsicABWLMjBc0P8KrovpGOdF7DOm+W5bXFCdGk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}